Water Tank Leak-Proofing with Puddle Flange – Installation by Udhhyog


 Leakage in water storage tanks is one of the most common and costly structural problems faced in residential, commercial, and industrial projects. Whether it's an underground sump, RCC overhead tank, or rainwater harvesting pit, water can seep through pipe penetrations in concrete—causing corrosion, structural weakness, and even health hazards.



At Udhhyog, we specialize in providing leak-proofing solutions using high-quality puddle flanges that are precision-engineered for water tank applications. Our flanges are trusted by civil engineers, builders, and infra contractors across India.

🧱 Why Use a Puddle Flange in Water Tanks?

When a pipe passes through a concrete tank wall or base, water tends to follow the outer pipe surface and leak into or out of the tank. A puddle flange breaks this path by forming a mechanical and waterproof barrier within the RCC structure.

✅ Key Benefit:
Stops seepage along the pipe’s outer surface, even under water pressure.

🛠️ Udhhyog’s Leak-Proof Installation Process

We ensure 100% waterproofing in every project with the following installation steps:

1. Pipe & Flange Preparation

  • Select the correct puddle flange based on pipe size and tank material (MS, GI, SS).

  • Weld or fix the flange securely around the pipe before installation.

2. Placement in Formwork

  • Insert the pipe with flange centrally in the RCC shuttering where it will pass through the wall or base slab.

  • Ensure the collar of the flange is fully embedded inside the concrete zone.

3. Concrete Pouring & Compaction

  • Pour RCC mix around the flange area, avoiding air pockets or gaps.

  • Compact thoroughly to ensure full bonding with the flange’s surface.

4. Post-Curing Inspection

  • After curing, inspect for moisture or seepage around the pipe.

  • Apply external waterproofing (e.g., bitumen or epoxy) for added protection if needed.

🔧 Udhhyog Tip: Use GI or SS puddle flanges in coastal or chemical water tanks for maximum corrosion resistance.

🔍 Where We Install Puddle Flanges in Tanks

  • Underground RCC sumps

  • Overhead storage tanks (OHTs)

  • Firefighting water tanks

  • Treated effluent holding tanks

  • Rainwater harvesting tanks

  • Pump chambers and valve pits

🧪 Features of Udhhyog Puddle Flanges

FeatureDetails
Pipe Sizes50mm to 600mm+
MaterialsMS, GI, SS 304/316
Flange Thickness5mm – 25mm
StandardsIS 1538, ASTM A105
Coating OptionsRed oxide, epoxy, hot-dip galvanizing
CustomizationBolt pattern, collar height, special coating

❓ FAQs – Water Tank Leak-Proofing with Puddle Flange

Q1: Can puddle flanges stop leakage in old tanks?
A: No. They must be installed during new construction. For old tanks, repair options include grouting or applying waterproof membranes.

Q2: Which flange material is best for drinking water?
A: SS 304 or SS 316 puddle flanges are ideal for potable water tanks due to their corrosion resistance and hygiene compliance.

Q3: How long do Udhhyog puddle flanges last?
A: With proper installation, they can last 20+ years with minimal maintenance.

Q4: Can I get installation support?
A: Yes. Udhhyog provides on-call technical guidance, datasheets, and custom drawings for projects.

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